TDA8944J/N1,112

Overview

The TDA8944J/N1,112 is a dual-channel stereo audio power amplifier manufactured by NXP USA Inc. It utilizes a Bridge Tied Load (BTL) architecture with an all-NPN output stage to deliver 7 watts per channel into an 8-ohm load at a 12-volt supply. The device operates within a supply voltage range of 6 to 18 volts and features a fixed voltage gain of 32 dB. Packaged in a 17-pin DBS17P DIL-bent-SIL format, it includes integrated standby and mute logic for efficient power management.

Feature Summary

• Bridge Tied Load configuration with all-NPN output stage
• Integrated thermal shutdown and short-circuit protection
• Three-level mode selection for standby, mute, and operation
• High supply voltage ripple rejection capability

Applications

• Mains-fed television sound systems
• Personal computer audio subsystems
• Portable audio equipment designs

Procurement Notes

Verify the current manufacturing status as this component may be discontinued or subject to product change notifications. Confirm that the DBS17P through-hole package aligns with your PCB footprint requirements. Ensure compliance with applicable environmental directives such as RoHS before finalizing procurement plans.

Selection Notes

Select this amplifier for applications requiring high efficiency and minimal external components. The BTL topology eliminates the need for large DC-blocking capacitors. Verify that the required heatsink design accommodates the thermal resistance characteristics under maximum power dissipation conditions.

Part Context

This part belongs to the TDA894x family of audio amplifiers. It shares pin compatibility with other members like the TDA8944AJ and TDA8946AJ, allowing for flexible PCB layout strategies. The device is designed to fit standard mono and stereo footprints within this specific product series.

Replacement Considerations

Consult official documentation for confirmed substitute part numbers. Direct replacements must maintain the DBS17P package and BTL functionality. Verify electrical parameter equivalence before implementation.

FAQ

How does the MODE pin control the operational state?

The MODE pin selects between three states: operating mode when voltage is below 0.5 V, mute mode between 3 V and VCC minus 1.5 V, and standby mode when voltage exceeds VCC minus 0.5 V.

What protection mechanisms are included?

The device features short-circuit protection against ground, supply, and load shorts, as well as thermal shutdown protection that activates at approximately 150 °C junction temperature.